GMAB in the 13F filings
Genmab A S · CUSIP 372303206
- Quarter end
- 31 Mar 2026
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 12 May 2026
- Managers listing it
- 17
- at least, of 95 tracked, among listed positions
- Comparable managers
- 91
- filed both Q4 2025 and Q1 2026; 4 listed it in both
- Shares listed
- 23,949,395
- combined, among listed positions
- Reported value
- $681m
- combined, at the quarter end
AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.
Among the 91 comparable managers: 11 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +265,726.
Managers listing GMAB in Q1 2026
17 of 17 holders
Largest increases and reductions, by shares
Increases
- Two Sigma Investments LPexisting position · 2,339,432 shares now+1,443,589
- Renaissance Technologies LLCexisting position · 4,414,550 shares now+921,700
- Millennium Management LLCexisting position · 792,293 shares now+697,720
- Moore Capital Management LPnew position · 211,705 shares now+211,705
- Jane Street Group LLCnew position · 98,432 shares now+98,432
Reductions
- AllianceBernstein LPexisting position · 9,557,149 shares now-1,319,945
- Marshall Wace LLPexisting position · 15,000 shares now-343,440
- Fidelity (FMR LLC)existing position · 1,011,726 shares now-45,614
- Hudson Bay Capital Management LPexisting position · 310,000 shares now-15,000
- Neuberger Berman Group LLCexisting position · 53,962 shares now-2,959
New positions and exits
New (7)
Exited (6)
- Susquehanna International Group LLPwas $19m
- Balyasny Asset Management LLCwas $12m
- Woodline Partners LPwas $11m
- Voloridge Investment Management LLCwas $2.6m
- Citadel Advisors LLCwas $588k
- Acadian Asset Management LLCwas $32k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q3 2019 | 3 | $95m | n.a. | n.a. |
| Q4 2019 | 3 | $99m | n.a. | n.a. |
| Q1 2020 | 5 | $114m | n.a. | n.a. |
| Q2 2020 | 6 | $224m | n.a. | n.a. |
| Q3 2020 | 7 | $364m | n.a. | n.a. |
| Q4 2020 | 5 | $238m | n.a. | n.a. |
| Q1 2021 | 3 | $121m | n.a. | n.a. |
| Q2 2021 | 3 | $187m | n.a. | n.a. |
| Q3 2021 | 3 | $166m | n.a. | n.a. |
| Q4 2021 | 3 | $168m | n.a. | n.a. |
| Q1 2022 | 4 | $168m | n.a. | n.a. |
| Q2 2022 | 4 | $96m | n.a. | n.a. |
| Q3 2022 | 7 | $412m | n.a. | n.a. |
| Q4 2022 | 6 | $422m | n.a. | n.a. |
| Q1 2023 | 3 | $333m | n.a. | n.a. |
| Q2 2023 | 2 | $343m | n.a. | n.a. |
| Q3 2023 | 3 | $385m | n.a. | n.a. |
| Q4 2023 | 4 | $548m | 4 | 0 |
| Q1 2024 | 6 | $540m | 2 | 4 |
| Q2 2024 | 6 | $457m | 5 | 1 |
| Q3 2024 | 6 | $447m | 3 | 1 |
| Q4 2024 | 8 | $480m | 6 | 1 |
| Q1 2025 | 8 | $495m | 6 | 1 |
| Q2 2025 | 10 | $495m | 3 | 7 |
| Q3 2025 | 7 | $643m | 3 | 5 |
| Q4 2025 | 5 | $617m | 8 | 10 |
| Q1 2026 | 6 | $623m | 11 | 12 |
| Q2 2026 | 7 | $583m | 15 | 6 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
GMAB and LLY →GMAB and JNJ →GMAB and VRTX →Choose a stock to compare with GMAB →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own GMAB, latest filings →Back to the 13F Explorer →